Yamaha YZ250F(W) Owner's Service Manual page 460

TRANSMISSION, SHIFT CAM AND SHIFT FORK
EC4H4810
Shift fork, shift cam and segment
1. Inspect:
• Shift fork 1
Wear/damage/scratches → Replace.
2. Inspect:
• Shift cam 1
• Segment 2
Wear/damage → Replace.
3. Check:
• Shift fork movement
Unsmooth operation → Replace shift
fork.
NOTE:
For a malfunctioning shift fork, replace not only
the shift fork itself but the two gears each adja-
cent to the shift fork.
EC4H5000
ASSEMBLY AND INSTALLATION
Transmission
1. Install:
• 5th pinion gear (24T) 1
• 3rd pinion gear (20T) 2
• Collar 3
• 4th pinion gear (22T) 4
• 2nd pinion gear (16T) 5
To main axle 6.
NOTE:
Apply the molybdenum disulfide oil on the
inner and end surface of the idler gear and on
the inner surface of the sliding gear, then
install.
4 - 100
ENG